Process of preserving rubber.



I. D. JEWBTT.

PROCESS OF PRBSERVING RUBBER.

APPLICATION FILED AUG. 19. 1913.

PMga

ISRAEL 1). JEWET'I, OF ST. PAUL, INDIANA.

PROCESS OF PRESERVIN G RUBBER' To all whom it may concern:

Be it known that I,-IsRAEL D. Jnwnr'r, a citizen of the United States,residing at St. Paul, in the county of Decatur and State of Indiana,have invented certain new and useful Improvements in Processes. ofPreserving Rubber, of which the. following is a specification.

The object of this invention is to preserve the resiliency, strength andlife of elastic rubber by the application to it of a preservativecomposition which is gradually absorbed by the rubber. My invention isparticularly applicable to such treatment of the rubber inner tubes andcasings of pneumatic tires, into the air chambers of Which tires it isintroduced and spread by the matter.

My preferred composition consistsv of the following ingredients,combined in the proportions stated, vi'z:

Glycerin 1 gallon. I Corn-syrup 1 gallon.

The glycerin is heated to about the boiling point and then thecorn-syrup is added slowly, the mixture being stirred until the syrup iscompletely dissolved and mixed. To the above I prefer, in practice, toadd approximately ten grains of anilin (red) 1n order to make thepreparation visible in handling it.

When cold, the above-named composition is ready for use. It can beapplied to advantage to any kind of soft elastic rubber and in anymanner which will bring it in contact with the surface of the rubber. Itwill Specificationof Letters Patent.

. Application filed August 19, 1913.

.my hand and seal at Indianapolis,

' Patented Ma. 9, 1915.

Serial No. 785,482.

not restore old, hard and decayed rubber,

but, if used on new rubber, or on that which is still soft and elastic,it will keep such rubber from becoming inelastic and dead, and willprevent the formation of pin-holes, due to decay. c In the applicationof the above-named composition to pneumatic tires it is intro ducedthrough the same nipple that is provided for the introduction of airinto the tire, and the same pumpwhich is used for supplying an to thepneumatic tire is used in 1n ecting my preservative compositiontherein.This is accomplished by connecting 1 up the air pump with the tire inthe usual way; by removing the piston and filling the cylinder with mycomposition, and then by forcing it'into the tire by the aid of thereplaced pis'ton, in the same manner that air would have been injected.After a short period of use a tire thus supplied with my compositionwill have its interior thoroughly coated with it and the glycerin willbe retained in contact with the inner surfaces, Where it has been. thussupplied, by the greater adhesiveness of, the corn-syrup, and after afew days application the glycerin will have been absorbed through boththe in- .ner and outer tubes.

Having thus fully described my invention, what I claim as new and wishto secure by Letters Patent of the United States, is,-

1. The process of preserving rubber which consists of coating itssurface with a mixture of glycerin andsyrup. 2. The process ofpreserving rubber which consists of coating its surface with a mixtureof glycerin andcorn syrup in substantially equal parts.

In witness whereof, I, have hereunto set Indiana, this 8th day ofAugust, A. D. one thousand nine hundred and thirteen.

ISRAEL D. JEWETT. 1.8.1

Witnesses:

J. A. MINTmzN, W. J. KALER.

